Task 4. Still considering Ardglass and Newlyn, use a Welch t-test to test the following hypotheses at 5%-level: and D. Ho: overall vessel lengths at both ports have the same mean H₁: overall vessel lengths at both ports have different means Ho: vessel engine powers at both ports have the same mean H₁: vessel engine powers at both ports have different means. D

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could you please help me with this, for this newlyn and Ardglass are subsets i extracted from a large amount of data could you please just provide the R commands for this 

Task 4. Still considering Ardglass and Newlyn, use a Welch t-test to test the following hypotheses
at 5%-level:
and
Ho: overall vessel lengths at both ports have the same mean
H₁: overall vessel lengths at both ports have different means
Ho: vessel engine powers at both ports have the same mean
H₁: vessel engine powers at both ports have different means.
For both tests, first compute the test statistic yourself (using simple R commands), and then re-do
the test using the R function t.test() (see help(t.test) for how to use this function). Make
sure that both methods give the same result. Comment on the applicability of the chosen test,
and discuss the results of the test.
Note: By default, the command t.test() will perform Welch t-test in R.
Transcribed Image Text:Task 4. Still considering Ardglass and Newlyn, use a Welch t-test to test the following hypotheses at 5%-level: and Ho: overall vessel lengths at both ports have the same mean H₁: overall vessel lengths at both ports have different means Ho: vessel engine powers at both ports have the same mean H₁: vessel engine powers at both ports have different means. For both tests, first compute the test statistic yourself (using simple R commands), and then re-do the test using the R function t.test() (see help(t.test) for how to use this function). Make sure that both methods give the same result. Comment on the applicability of the chosen test, and discuss the results of the test. Note: By default, the command t.test() will perform Welch t-test in R.
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